Hose.



Patented Aug. 7, I900. J. F. MCGUIRE.

HOSE

(Application filed May 17, 1900.)

(No Model.)

,ln 0 e 712 011 ,flg n e Sa'es NlTED STATES PATENT OFFICE;

JOHN F. MCGUIRE, OF AKRON, OHIO, ASSIGNOR TO THE B. F. GOODR-IOII COMPANY, OF SAME PLACE.

Hose,

SPECIFICATION forming part of Letters Patent l'Sl'o. 655,507, dated August 7, 1900.

Application filed May 1 7, l 900.

To all whom it may concern:

Be itknown that I, JOHN F. MCGUIRE,a citizen of the United States, residing at'Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Hose, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings.

This invention relatespa-rticularly to hose used to couple pipes of an air-brake system between car-platforms. Such hose when not coupled hangs'with the interior exposed to the outside air, whereby sand and dirt work into the-hose and get between the end of the nipple and the rubber, and as the hose expands under pressure this grit becomes worked into the rubber, abrading it at the edge of the nipple.

In the ordinaryair-brake system there is a cock adjacent to the nipple to which the hose is attached. cock sticks and the brakeinan to loosen it customarily strikes it with a coupling-pin or other heavy piece of metal and not infrequently his blow glances, landing on the airhose near the edge of the nipple, thereby injuringthe hose at this point. As soon asst-he inner rubber and duck become worn through the hose is rendered practically worthless for the high air-pressure which it must sustain. So serious are these destructive agencies that I estimate eighty-five per cent. of the air-hose used in the ordinary train-brakes wear out at the edge of the nipple and become worthless before they are worn out elsewhere; but while these facts are well known no satisfactory remedy has, so far as I know, been heretofore proposed. To relieve the hoseby putting, a padding of soft rubber on the outside of the nipple and covering the inner end of it has been tried. Inasmuch, however, as the exterior surface of the nipple must be considerably larger than. the normal interior surface of the hose, in order to make an abso lutely-tight fit for the severe pressure to which the hose is put so much friction is encountered in inserting the nipple with the yielding packing that the latter is very frequently torn loose from the nipple and either becomes hunched on an intermediate portion of the nipple or worksncntirely frcc into the hose- Serial No. mom. on mom.)

Frequently the handle of this,

I pipe, in each event leaving the edge of the nipple free and actually holding it away from the wall of the hose, so that the dirt can work in more easily than if the soft packing had not been there, and when the soft packing tears entirely loose having the additional disadvantage that the latter sometimesis carried through the hose into the triple valve of the air-brake, interfering with its operation. Moreover, if thesoft packing carried by the nipple could be made of suificient strength to insure its not being torn apart in inserting the nipple it would be of such size as to bend the hose outward considerably at the edge of the nipple, and the hose, being quite stiff from the necessary thickness, will approach this increaseddiameter somewhat gradually, leaving an easy opportunity for the grit and sandto work in between the hose and the packing, and the sand so working in will soon Y nipple, it has been proposed to'put arigid metallic ring inside the nipple, binding the packing thereto and letting the packing extend over the edge of the nipple; but thishas= the additional disadvantage that the inside ring reduces the effective size'of the trainpipe, andthis in a long train of freight-cars, for example, amounts to a, very material impedance to the air-discharge, reducing the efiicicncy of the air-brakesystem. I

In addition to all the disadvantages above set out of nipples which carry soft packing is that of securing the packing to-the nipple. The nipples become rusted in use, andthus have considerable variation in size, it being the custom to i use the nipples again and again as new hose replaces that which is worn out. I\L[016OV6I,SOU16 provision must be'm'ade for renewing the packing and for securing y it to nipples which thus become of various sizes, which .is a comparatively difficplt andexpcnsive matter and 'can only be conveniently performed at a suitable machine-shop. I have devised a very simple means for protecting the hose from the "abrasign and wear above referred to. This consists in securing to the bore of the hose at a-distance from the t I I 855,50?

end of the hose equal to the projecting portion of the nipple an annularboss or fillet,on which the edge of the nipple lies when inserted, the fillet bearing snugly against the edge of the nipple and preventing the access of sand or grit between the nipple and hose and also protecting the hose in case of an ex terior blow.

My invention thus consists, broadly, of a hose having such fillet and also of the specific form'inwhich I have found it prefer- Fig.

able to make the fillet, as hereinafter shown sents the hose, B the nipple, and C the strap,

jecting which may encircle the hose to bind it to the nipple. The nipple may havethe usual pro: sleeve-b with the bead b around it.

The fillet is designated ct. It is formed at such distance from the end of the hose that the end b of the sleeve 1) rests-on it when the nipple is in place, as clearly shown in Fig. 3. This fillet on the side toward thev end of the hose inclines gradually, as at a, so that the nipple will Beyond this gradual incline a is a cylindrical part a of sufiicient length so that the end of the nipple will rest upon it throughout the variation of the nipple, (owing to the irregularity in casting them or subsequent rust,) and beyond the circular part a the fillet returns somewhat abruptly; as at a, to the wall of the hose. The edge a inclines enough so that there is no tendency for dirt or grit to stick there, but is made as abrupt as is thus efficient to savematerial. I Corresponding fillets aare placed near each end of the hosepipe, as indicated in Fig. 1. The fillets are secured to the' bore of the hose, as stated, preferably by being made integral therewith.

This is accomplished by having an annular groove in the mandrel on which the hose is made and forcing the rubber down into this groove and backing up .the depressionthus ride up on it in being inserted.

made with other gum. This makes a cofrtinuous smooth skin on the inside of the pipe. This means for protecting the hose allows theordinary nipple to be used without any accu-,

rate '01'. expensive work being done on it to make it carry a yielding packing. Old nipples can be used as'well as new ones, andthe efiective bore of the nipple is in no way reduced. Moreover, the form of the fillet which i allows no edge in which the dirt could colleet' could not be provided for a packing carried by the nipple, for in the latter event the {main ing would be rolled up onto the outer side of the nipple when the latter was inserted.

It is apparent that in the matter of cheapness my protecting means has a decided advantage in that. the rubber packing is carried by other rubber, which is a very simple operation and It enables the purchaser to obtain the hose and protection complete, ready for use, from the rubber manufacturer and the nip is from the iron manufacturer without the a ditional expense of rubbering the nipple.

Having described my invention, I claiinis done when the hose is made.

i. A rubber hose having within it an annular fillet or boss of yielding material secured to the bore of the hose, substantially as do 3 8o" scribed. I

2. A rubber hose having within it anannw lar fillet or boss made integrally with the hose.

whereby a continuousskin of rubber is formed on the inside of the hose and over th e' boss,

substantially as desgribed 1/ 3. A cylindrical hosehavingwithin it comparatively near its end an annular fillet inclined toward the end of the hose, said fillet.

being of yielding material and being carried by the hose, substantially as described.

4. A rubber hose having within it comparatively near its end an annular fillet which fillet has a cylindrical face a and a graduallyinclined face a leading therefrom to the bore of the hose toward the outer end of the latter, substantially as described. I p r In testimony whereof I hereunto: afiix my signature in the presence of two witnesses.

JOHN F. MCGUIRE.

Witnesses: I y l P. W. LEAVITT, W. F. READING. 

